663960739 has 8 divisors (see below), whose sum is σ = 715241072. Its totient is φ = 612709920.

The previous prime is 663960727. The next prime is 663960749. The reversal of 663960739 is 937069366.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663960739 - 2⁷ = 663960611 is a prime.

It is a super-2 number, since 2×663960739² = 881687725866852242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 663960692 and 663960701.

It is not an unprimeable number, because it can be changed into a prime (663960709) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67729 + ... + 76909.

It is an arithmetic number, because the mean of its divisors is an integer number (89405134).

Almost surely, 2^663960739 is an apocalyptic number.

663960739 is a deficient number, since it is larger than the sum of its proper divisors (51280333).

663960739 is a wasteful number, since it uses less digits than its factorization.

663960739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14757.

The product of its (nonzero) digits is 1102248, while the sum is 49.

The square root of 663960739 is about 25767.4356310441. The cubic root of 663960739 is about 872.3969392476.

The spelling of 663960739 in words is "six hundred sixty-three million, nine hundred sixty thousand, seven hundred thirty-nine".